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How many lamps do I need in a 7 meter hallway?

My house under construction has a hallway with a total length of 7 meters (length of the living room, + stairs upstairs + toilet). The electrician has planned 2 light fixtures. It seems to me that this is not enough.

Corridor with no windows and about 150 cm wide. A classic subway corridor.

How many lighting points should you plan for the hallway?

• lighting